importance

Question 1

active transport

Answer 1

molecules & ions pumped across the cell membrane

• > can move chemicals from high concentration to low concentration
  ex: when blood passes by

Question 2

diffusion

Answer 2

molecules being spread equally through the space they occupy

Question 3

small intestine

Answer 3

most important region for absorption

Question 4

glucose and amino acids

Answer 4

picked up by blood

Question 5

lipids

Answer 5

picked up by lacteal

Question 6

feature of villi

Answer 6

1. epithelium is one cell thick
2. microvilli (x20 surface area)
   3.
   4.